The extra white skin that you have is probably milia or colloid milium.

They occur as age advances.

You could use the Retino A cream once daily at night over those lesions for 15 days.

They will reduce a bit but the best treatment is to get them extracted i.e. removed or getting them burnt off from a dermatologist.However they do come back after removal, as it’s a change in skin that is happening as we age. There is no way to completely stop it from coming. One can try slowing down the process by application of a sunscreen before going out to the sun.